CVE-2025-49596criticalCode execution2025-06-13
CVE-2025-49596: MCP Inspector proxy server lacks authentication between the Inspector client and proxy
Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio.
What it is
Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.
How to check
- Affected: @modelcontextprotocol/inspector (npm) < 0.14.1.
- Compare your installed version with the range above (command below).
How to fix
- Upgrade @modelcontextprotocol/inspector to 0.14.1 or later.
npm ls @modelcontextprotocol/inspectorSources
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